Sweet Potato Pizza with Maitakes

Ingredients

• 2½ cups peeled and chopped sweet potatoes
• 1 cup gluten-free all-purpose flour
• 2 tablespoons extra virgin olive oil
• 1 tablespoon apple cider vinegar
• 1 tablespoon dried oregano
• ½ teaspoon garlic powder
• ¼ teaspoon sea salt
• ½ pound maitake mushrooms
• 1 spring onion, sliced into thin wedges
• 1 tablespoon mirin
• ½ cup pesto
• 2 cups arugula
• ¼ cup toasted pine nuts
• Balsamic vinegar